To make this set even more effective, you can do the following:1) Use a tempo trainer for the dolphin kicks. Suggested tempos: 0.50 for round 1, 0.40 for round 2, 0.30 for round 3, self-selected tempo (no device) on round 4. Only very good kickers will be able to hold 0.30 and still kick efficiently.2) Time all of the kicks or just #5. If the athlete sticks to the tempos, these should give you an idea of the most efficient tempo for the athlete to be kicking at.3) Do it all with a parachute on. That sounds like fun!4) Do it fins on. Or fins and a parachute. Or running shoes!